| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an exhaust gas NOx removal system of cogeneration which reduces cost. SOLUTION: A cogeneration system is constituted in such a manner that a catalyst reactor 4 in which NOx decomposition catalyst is filled is provided in an air exhaust passage 3 from a gas engine 1 to an exhaust heat recovery boiler 2 and that a reducing agent pouring port 5 in which ammonia gas is poured is provided in the air exhaust passage 3 on the upstream side of the catalyst reactor 4. In this case, a gas cylinder 6 is used as an ammonia gas source, a gas governor 8 is provided in an ammonia gas supply passage 7, and pressure of an engine air supply pipe 10 is applied as back pressure of a diaphragm for controlling a valve disc of the gas governor 8. Consequently, it is possible to control ammonia gas pour amount proportionally due to an extremely simple configuration consisting of the gas cylinder and the gas governor.</p> |
